Number of Records |
---|
The number of satellite almanac records contained in the file |
Units: Records Range: 0 to 32 Accuracy: 1 Precision: 2 significant digits Frequency: Once per file Type: Integer |
Title |
A short description of the file |
Units: None Range: Any combination of valid ASCII characters Accuracy: None Precision: 24 significant characters Frequency: Once per file Legality Checks: Valid ASCII characters Type: ASCII string |
GPS Week Number |
The almanac reference week (VINA) for all almanacs in the file per ICD-GPS-240D |
Units: Weeks Range: 0 to 1023 Accuracy: 1 Precision: 4 significant digits Frequency: Once per file Legality Checks: Range check Type: Integer |
GPS Time of Applicability |
The almanac reference time (TOA) for all almanacs in the file per ICD-GPS-240D |
Units: Seconds Range: 0 to 602112 Accuracy: 1 Precision: 6 significant digits Frequency: Once per file Legality Checks: Range check Type: Long integer |
PRN Number |
The satellite PRN number per IS-GPS-200M. This is a required data item as it is the GPS user's primary means of identifying GPS satellites. It is equivalent to the space vehicle identification (SVID) number of the satellite. |
Units: None Range: 1 to 32 Accuracy: None Precision: 2 significant digits Frequency: Number of records per file Legality check: Range check Type: Integer |
SVN Number |
The satellite "SVN" reference number. This is not a required data item and is normally included only for cross-reference with the operational control system (OCS). |
Units: None Range: 0 to 255 Accuracy: None Precision: 3 significant digits Frequency: Number of records per file Legality check: Range check Type: Integer |
Average URA Number |
The satellite "average" URA number, with URA number as defined in ICD-GPS-240D. This is not an item in the raw almanac file but is based on the average URA value transmitted by this satellite in its subframe 1 data sets. |
Units: None Range: 0 to 15 Accuracy: 1 Precision: 2 significant digits Frequency: Number of records per file Legality check: Range check Type: Integer |
Eccentricity |
The satellite almanac orbital "eccentricity" (e) as defined in ICD-GPS-240D. |
Units: Unitless Range: 0.0 to 0.03 Accuracy: 4.7E-7 Precision: 7 significant digits Frequency: Number of records per file Legality check: Range check Type: Real |
Inclination Offset |
The satellite almanac orbital "inclination angle offset" (i) as defined in ICD-GPS-240D. This is an item in the raw almanac file and does not include the 0.30 semicircle reference value. This should not be confused with the "i0" term in the satellite ephemeris files. |
Units: Semicircles Range: -9.999999E-2 to +9.999999E-2 Accuracy: 1.91E-6 Precision: 7 significant digits Frequency: Number of records per file Legality check: Range check Type: Real |
Rate of Right Ascension |
The satellite almanac orbital "rate of right ascension" (OMEGADOT) as defined in ICD-GPS-240D. |
Units: Semicircles/second Range: -9.999999E-7 to +9.999999E-7 Accuracy: 3.6E-12 Precision: 7 significant digits Frequency: Number of records per file Legality check: Range check Type: Real |
Square Root of Semi-Major Axis |
The satellite almanac orbital "square root of the semi-major axis" (A)1/2 as defined in ICD-GPS-240D. |
Units: Meters1/2 Range: 79.0 to 9999.99999 Accuracy: 4.8E-4 Precision: 9 significant digits Frequency: Number of records per file Legality check: Range check Type: Real |
Longitude of Orbital Plane |
The satellite almanac orbital "geographic longitude of the orbital plane at the weekly epoch" (OMEGA)0 as defined in ICD-GPS-240D. |
Units: Semicircles Range: -1.0 to +1.0 Accuracy: 1.1E-7 Precision: 9 significant digits Frequency: Number of records per file Legality check: Range check Type: Real |
Argument of Perigee |
The satellite almanac orbital "argument of perigee" (ω) as defined in ICD-GPS-240D. |
Units: Semicircles Range: -1.0 to +1.0 Accuracy: 1.1E-7 Precision: 9 significant digits Frequency: Number of records per file Legality check: Range check Type: Real |
Mean Anomaly |
The satellite almanac orbital "mean anomaly" (M0) as defined in ICD-GPS-240D. |
Units: Semicircles Range: -1.0 to +1.0 Accuracy: 1.1E-7 Precision: 9 significant digits Frequency: Number of records per file Legality check: Range check Type: Real |
Zeroth-Order Clock Correction |
The satellite almanac zeroth-order clock correction term (af0) as defined in ICD-GPS-240D. |
Units: Seconds Range: -9.9999E-4 to +9.9999E-4 Accuracy: 9.5E-7 Precision: 5 significant digits Frequency: Number of records per file Legality check: Range check Type: Real |
First-Order Clock Correction |
The satellite almanac first-order clock correction term (af1) as defined in ICD-GPS-240D. |
Units: Seconds/second Range: -9.9999E-9 to +9.9999E-9 Accuracy: 3.6E-12 Precision: 5 significant digits Frequency: Number of records per file Legality check: Range check Type: Real |
Satellite Health |
The satellite subframe 4 and 5, page 25 six-bit health code as defined in ICD-GPS-240D expressed in integer form. |
Units: None Range: 0 to 63 Accuracy: None Precision: 2 significant digits Frequency: Number of records per file Legality check: Range check Type: Integer |
Satellite Configuration |
The satellite subframe 4, page 25 four-bit configuration code as defined in ICD-GPS-240D expressed in integer form. |
Units: None Range: 0 to 15 Accuracy: None Precision: 2 significant digits Frequency: Number of records per file Legality check: Range check Type: Integer |
GPS SEM Almanacs | |||
---|---|---|---|
1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 |
2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 |
2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 |
2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 |
Latest | |
---|---|
Status Messages | NANUs |
SEM Almanacs | Yuma Almanacs |